Walker



FIG. 1 is a front, right, and top perspective view of a walker, showing my design.

FIG. 2 is a rear, left, and bottom perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof.

FIG. 8 is a bottom plan view thereof.

FIG. 9 is a partial enlarged view of an area labeled 9 in FIG. 1 comprising a regulator.

FIG. 10 is a partial enlarged view of an area labeled 10 in FIG. 2 comprising a brake strip.

FIG. 11 is a partial enlarged view of an area labeled 11 in FIG. 5 comprising a connecting part; and,

FIG. 12 is a partial enlarged view of an area labeled 12 in FIG. 8 comprising a spring.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the walker that form no part of the claimed design. 

CLAIM The ornamental design for a walker, as shown and described. 